公开(公告)号：US20150138130A1

公开(公告)日：2015-05-21

申请号：US14085934

申请日：2013-11-21

Applicant: PIXART IMAGING INC.

Inventor： TOM MURPHY ,  HSIN-CHIA CHEN ,  WILLIAM HAN ,  RAMAN SAHGAL

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: There is provided a capacitive touch system including a gain control unit sequentially receiving a plurality of digital detected signals of a detection frame. The gain control unit includes a gain buffer and a control circuit. The gain buffer is configured to store a current gain sheet. The control circuit calculates a first gain sheet according to a setpoint and the digital detected signals of the detection frame, compares a current roughness of the current gain sheet with a first roughness of the first gain sheet and replaces the current gain sheet in the gain buffer by the first gain sheet when the first roughness is flatter than the current roughness.

Abstract translation: 提供了一种电容式触摸系统，其包括依次接收检测帧的多个数字检测信号的增益控制单元。 增益控制单元包括增益缓冲器和控制电路。 增益缓冲器配置为存储当前增益表。 控制电路根据设定点和检测帧的数字检测信号来计算第一增益片，将当前增益片的当前粗糙度与第一增益片的第一粗糙度进行比较，并将增益缓冲器中的当前增益片代替 当第一粗糙度比当前粗糙度更平坦时，通过第一增益片。

公开(公告)号：US20150268758A1

公开(公告)日：2015-09-24

申请号：US14219168

申请日：2014-03-19

Applicant: PIXART IMAGING INC.

Inventor： CHUNG-WEN LO ,  KEN CRANDALL ,  HSIN-CHIA CHEN ,  RAMAN SAHGAL

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F3/0416

Abstract: There is provided a concurrent driving capacitive touch sensing device including a drive end, a capacitive sensing matrix and a detection end. The capacitive sensing matrix includes a plurality of drive electrodes and sense electrodes crossing to each other. The drive end is configured to concurrently input cycle data of encoded and modulated drive signals into the drive electrodes. The detection end is coupled to one of the sense electrodes and configured to acquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, wherein the drive end resends the cycle data according to the response signal.

Abstract translation: 提供了包括驱动端，电容感测矩阵和检测端的并行驱动电容式触摸感测装置。 电容感测矩阵包括彼此交叉的多个驱动电极和感测电极。 驱动端被配置为将编码和调制的驱动信号的周期数据同时输入到驱动电极中。 检测端耦合到感测电极中的一个并且被配置为获取对应于与耦合的感测电极相关联的周期数据的预定数量的采样值，并根据采样值产生到驱动端的响应信号，其中驱动 根据响应信号重新发送循环数据。